diff --git a/src/EntityImporterDefinition.php b/src/EntityImporterDefinition.php
index 62dd615..50a0400 100644
--- a/src/EntityImporterDefinition.php
+++ b/src/EntityImporterDefinition.php
@@ -24,7 +24,7 @@ interface EntityImporterDefinition
      */
     public function getName(): string;
 
-    /***
+    /**
      * Description displayed in "Available import types" overview.
      *
      * @return string
diff --git a/src/Reader/ApiReader.php b/src/Reader/ApiReader.php
index f010259..436ad1d 100644
--- a/src/Reader/ApiReader.php
+++ b/src/Reader/ApiReader.php
@@ -11,6 +11,7 @@
 use Fastbolt\EntityImporter\EntityImporterDefinition;
 use Fastbolt\EntityImporter\Reader\Api\PagePaginationStrategy;
 use Fastbolt\EntityImporter\Reader\Api\PaginationStrategy;
+use Fastbolt\EntityImporter\Types\ImportSourceDefinition\Api;
 use Fastbolt\EntityImporter\Types\ImportSourceDefinition\ImportSourceDefinition;
 use GuzzleHttp\Client;
 use GuzzleHttp\Exception\RequestException;
@@ -29,7 +30,7 @@ class ApiReader implements ReaderInterface
 
     private EntityImporterDefinition $importerDefinition;
 
-    private ImportSourceDefinition $importSourceDefinition;
+    private ImportSourceDefinition|Api $importSourceDefinition;
 
     private array $options;
 
@@ -54,9 +55,12 @@ public function __construct(
     ) {
         $this->clientFactory          = $clientFactory;
         $this->importerDefinition     = $importerDefinition;
-        $this->importSourceDefinition = $importerDefinition->getImportSourceDefinition();
         $this->options                = $options;
 
+        /** @var Api $apiTmp */
+        $apiTmp = $importerDefinition->getImportSourceDefinition();
+        $this->importSourceDefinition = $apiTmp;
+
         Assert::keyExists($this->options, 'api_key');
 
         if (!isset($this->options['pagination_strategy'])) {
@@ -120,23 +124,26 @@ public function valid(): bool
      */
     private function loadBulkData(int $offset): void
     {
+        /** @var Api $importSourceDefinition */
+        $importSourceDefinition = $this->importSourceDefinition;
         $clientFactory = $this->clientFactory;
         $client        = $clientFactory();
 
         /** @var PaginationStrategy $paginationStrategy */
         $paginationStrategy   = $this->options['pagination_strategy'];
         $paginationParameters = $paginationStrategy->getRequestParameters($offset);
+        $queryParameters      = $importSourceDefinition->getQueryParameters();
         $requestParameters    = array_merge_recursive(
             [
                 'verify'  => false,
                 'headers' => [
                     'Accept'       => 'application/json',
-                    'X-AUTH-TOKEN' => $this->importSourceDefinition->getOptions()['api_key'],
+                    'X-AUTH-TOKEN' => (string) $importSourceDefinition->getOptions()['api_key'],
                 ],
             ],
-            $paginationParameters
+            array_merge_recursive($queryParameters, $paginationParameters)
         );
-        $url                  = $this->importSourceDefinition->getSource();
+        $url                  = $importSourceDefinition->getSource();
         $requestMethod        = Request::METHOD_GET;
 
         try {
diff --git a/src/Types/ImportSourceDefinition/Api.php b/src/Types/ImportSourceDefinition/Api.php
index b3bd453..63aad2f 100644
--- a/src/Types/ImportSourceDefinition/Api.php
+++ b/src/Types/ImportSourceDefinition/Api.php
@@ -22,18 +22,25 @@ class Api implements ImportSourceDefinition
      */
     private array $options;
 
+    /*
+     * @var array<array-key, mixed>
+     */
+    private array $queryParameters;
+
     private bool $throwOnSourceUnavailable = true;
 
     /**
-     * @param string              $apiHost
-     * @param string              $apiPath
-     * @param array<string,mixed> $options
+     * @param string               $apiHost
+     * @param string               $apiPath
+     * @param array<string,mixed>  $options
+     * @param array<string,string> $queryParameters
      */
-    public function __construct(string $apiHost, string $apiPath, array $options)
+    public function __construct(string $apiHost, string $apiPath, array $options, array $queryParameters = [])
     {
         $this->options = $options;
         $this->apiHost = $apiHost;
         $this->apiPath = $apiPath;
+        $this->queryParameters = $queryParameters;
     }
 
     /**
@@ -72,6 +79,14 @@ public function getOptions(): array
         return $this->options;
     }
 
+    /**
+     * @return array<array-key, mixed>
+     */
+    public function getQueryParameters(): array
+    {
+        return $this->queryParameters;
+    }
+
     /**
      * @return ArchivingStrategy
      */